This video lesson from Yossarian the Grammarian explains how to determine if a clause is restrictive or nonrestrictive. He also shows where to place each comma after identifying the type of clause. [7:14]

This video lesson from Yossarian the Grammarian demonstrates how to punctuate restrictive clauses and phrases. He also show the viewer how to revise restrictive clauses for clarity. [7:24]

David and Paige, KA's resident grammarians, cover appositives and how to use commas along with them.

A relative pronoun is a word like "that" or "which" or "who", so a relative clause is a clause that begins with a relative pronoun. In the sentence "The dragon who breathed blue fire has retired," "who breathed blue fire" is a relative...